Shutting Down The System - Viessmann VITOPLEX 300 Service Instructions Manual

Commissioning, inspection, maintenance
Commissioning the system
Operating and service instructions for the control
unit and the burner
01. Close the gas shut-off valve and open the boiler
door.
02. Check internal pipes
hot gas flues . Spring clip
B
pipes must lock into place behind first constriction
.
E
Fig. 1
Internal pipe extractor
A
03. Check that the ventilation air aperture in the instal-
lation room is open.
04. Fill the heating system with water and vent the
system.
Permissible operating pressure: 6 bar (0.6 MPa)
05. Record the amount of fill water and its hardness in
chapter "Checking the water quality".
!
Please note
Unsuitable water quality can damage the
boiler body.
Operate boilers only with softened water.
Observe the instructions in chapter "Water
quality requirements" on page 18.

Shutting down the system

1. Switch OFF the mains isolator or the power supply,
and safeguard against unauthorised reconnection.
2. Interrupt the burner power supply. If installed, pull
plug-in connectors
fA
3. Close the gas shut-off valve.
10
are correctly inserted into
C
of the internal
D
and from the burner.
lÖ
06. Check the system pressure.
07. Check the oil level or the gas supply pressure.
08. Open the flue gas damper (if installed).
09. Check that the cleaning aperture on the flue outlet
is closed.
10. Open the shut-off valves in the oil or gas line.
11. Switch ON the mains isolator, the switch for the
heating circuit pump and the burner ON/OFF
switch, in that order. Observe the burner manufac-
turer's operating instructions.
12. The dew point range must be cleared as quickly
as possible. For this reason prevent all heat sup-
ply to consumers when heating the system from
cold. This also applies when restarting after main-
tenance and cleaning work.
!
Please note
During boiler heat-up, unpleasant fumes
and odours can result from outgassing from
the thermal insulation, the thermal block
and the paint.
Ventilate the room during commissioning.
13. Once the flow temperature has been reached,
successively switch on the heat consumers.
Switch the burner over to automatic mode.
!
Please note
Internal gas emissions from the thermal
block can lead to increased CO values in
the flue gas.
Continue to operate the boiler until a decline
can be clearly recognised.
14. Check all gaskets and plugs, and retighten if nec-
essary.
15. Check the boiler door and cleaning cover after
approx. 50 hours run and retighten all screws.
Danger
Heating water escaping under pressure will
injure bystanders.
Only open the connections on the heating water
side after the boiler has been depressurised.